The tragedy of the commons. The population problem has no technical solution; it requires a fundamental extension in morality.
D007220:Industrial Waste; D007878:Legislation as Topic; D009014:Morals; D011155:Population Control; D011156:Population Density; D012722:Sewage; D012946:Social Welfare; D014876:Water Pollution
D007220:Industrial Waste; D012722:Sewage